How to convert 24 hr format time in to 12 hr Format?

Here is the code to convert 24-Hour time to 12-Hour with AM and PM. If you don't want AM/PM then just replace hh:mm a with hh:mm.

 import java.text.SimpleDateFormat;  
 import java.util.Date;  
 public class Main {   
   public static void main(String [] args) throws Exception {  
     try {      
       String _24HourTime = "22:15";  
       SimpleDateFormat _24HourSDF = new SimpleDateFormat("HH:mm");  
       SimpleDateFormat _12HourSDF = new SimpleDateFormat("hh:mm a");  
       Date _24HourDt = _24HourSDF.parse(_24HourTime);  
       System.out.println(_24HourDt);  
       System.out.println(_12HourSDF.format(_24HourDt));  
     } catch (Exception e) {  
       e.printStackTrace();  
     }   
   }   
 }  

Output:

Thu Jan 01 22:15:00 IST 1970
10:15 PM

Another Solution:

System.out.println(hr%12 + ":" + min + " " + ((hr>=12) ? "PM" : "AM"));